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Solaris Interview Questions & Answers - Learning Mode

Solaris Interview Questions & Answers - Learning Mode

Solaris is a Unix operating system originally developed by Sun Microsystems. It superseded their earlier SunOS in 1993. Oracle Solaris, so named as of 2010, has been owned by Oracle Corporation since the Sun acquisition by Oracle in January 2010. Solaris is the computer operating system that Sun Microsystems provides for its family of Scalable Processor Architecture-based processors as well as for Intel-based processors. Sun has historically dominated the large UNIX workstation market.

Try Solaris Interview Questions & Answers - Exam Mode

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Solaris Interview Questions & Answers - Learning Mode
Try Solaris Interview Questions & Answers - Exam Mode
Question: What are the main differences between solaris 10 and 9?

Answer: The main difference in solaris 9 & solaris 10 is "SMF(Solaris Management Facility)".
In solaris 9, if any service goes down then we should restart all services this is the disadvantage.
But in solaris 10,if any service goes down then that particular service we can select and enable it instead of restarting all services. Source:
Question: What is difference between solaris single user mode and multi user mode ?

Answer: Single user mode is the character based mode, we can perform administrator task and all.

In Multiuser mode , runlevel 3 is the default run of that.We can perform all types of system functions.
Question: What is the big difference between /dev/dsk and /dev/rdsk

Answer: In Solaris whenever you create a new slice using format command a raw physical slice or a Raw Device will be created which is addressed as /dev/rdsk/c#d#s# where # is the number for slice.

After formatting it with newfs command the slice will be addressed as /dev/dsk/c#d#s# which can now be used for mounting.

eg. newfs /dev/rdsk/c0d0s4

mkdir /oracle

mount /dev/dsk/c0d0s4 /oracle

After mounting /dev/dsk/c#d#s# is called as Block Device

/d Source:
Question: What would a XIR signal do to a server and why would it be used?

Answer: XIR signal used by reset command in solaris.

reset(1M) allows you to reset one or more domains in one of two ways: reset the hardware to a clean state or send an externally initiated reset (XIR) signal. The default is to reset the hardware to a clean state. You will receive an error if the virtual keyswitch is in the secure position. An optional confirmation prompt is given by default. Refer to Chapter 6 in the System Management Services (SMS) 1.2 Administrator Guide for the Sun Fire 15K/ Source:
Question: You logged into the system using telnet.
As a system administrator, how would you figure out the system transaction is slow between the system you logged into and from the system you did telnet login?

Answer: you can simply use the time command on both systems.! For example:

time <<trans>>

out put will be like..
real 0m2.009s
user 0m0.000s
sys 0m0.000s

So, in actuality, It took a total of 2.009 seconds of my time to watch this command complete. But, as you can see, it used virtually no processing time.

For small transcation you may not find the much difference(sometimes no diff) Source:
Question: What is difference between Process and Daemon in Solaris?

Answer: A 'daemon' is a software process that runs in the background (continuously) and provides the service to client upon request. For example named is a daemon. When requested it will provide DNS service. Other examples are:

xinetd (it is a super-daemon, it is responsible for invoking other Internet servers when they are needed)
inetd (same as xinetd, but with limited configuration options)
sendmail/postfix (to send/route email)
Apache/httpd (web server)
'server process Source:
Question: what file do you modify to change the mail alises (give full path)?

Answer: /etc/mail/ Source:
Question: What file controls system wide password aging?

Answer: /etc/shadow
Question: What command can you use to display all of your groups?

Answer: On AIX You can use
groups -To Display full list
id -G - To display group id number

On Solaris you can use
groups - To display full list
id -a - To diaplsy full list of groups with group id numbers

Question: Where are the templates stored that are copied into the users home directories for their personal customizations?

Answer: /etc/skel Source:
Question: Explain about the command ls?

Answer: Ls command gives a way to the main directory and also gives access permissions for files in Solaris. It displays and prints user and group ownerships, file access permissions, filename and files size and creation date. Source:
Question: How would you find out what version of Solaris is currently running?

Answer: Run the command showrev. There's a man page on showrev and there are switches to help you do whatever you're trying to do Source:
Question: How can i disable STOP+A utility on SUN machines, which brings system into OK> prompt?

Answer: in /etc/system set abort_enable=0 will disable STOP-A ________________________________________There are several ways to disable "STOP-A"
(1)Edit the /etc/default/kbd file
(2)Use the "kbd -a disable" command
(3) Edit /etc/system file
set abort_enable = 0 Source:
Question: What is after the VTOC on the root filesystem?

Answer: A solaris disk has an area called volume table of contents(VTOC) that stores information about disk structure and organization.
Question: Which obp command has a premenent allais?

Answer: When NValias need is:

In case system can not boot from primary disk and it is needed to make another boot disk to access the data , nvalias command is used.

nvalias command makes the device alias and assigns an alternate name to a physical disk. Physical address of target disk is required which can be had by show-disk command on ok>.

ok> nvalias disk7 /iommu@f,e0000000/sbus@f,e0001000/dma@3,81000/esp@3,80000/sd2,0

The new aliased disk can Source:
Question: What are the different ways to execute profiles?

Answer: Profiles can be executed in many different ways some of them are
1) Pfexec executes a single command in profile
2) With some restrictions pfsh and pfcsh can be executed.
3) By directly logging into the account using su. Source:
Question: What is the difference between a probe-scsi and a probe-scsi-all?


* Collapse/Expand Answer of Question What is the difference between a probe-scsi and a probe-scsi-all?

Both these commands are run at obp (open boot Prom) probe-scsi will probe the internal scsi and probe-scsi-all will probe both internal and external scsi.

Maybe not the best explanation but not bad...
The probe-scsi command communicates with all SCSI devices connected to on-board SCSI controllers.

The pro Source:
Question: What command enables a printer?

Answer: enable Source:
Question: What flag used with patchadd will prevent a later back out by preventing patchadd from backing up files? If this flag is used, the patch cannot be removed.

Answer: You have to use the option "d" along with th patchadd commnad.

patchadd -d
Question: What command enables a printer?

Answer: enable Source:

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India News Network
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